unbork 1.0.1

Based on a blog post by Rowan Thorpe (http://rowanthorpe.wordpress.com/2012/10/15/unmangle-utf-8-from-double-encoded-utf-8-my-shell-script-and-batch-script-tweaks/), forcefully replaces broken UTF-8 encoded as pairs of Latin-1 characters. Includes a verbatim copy of Rowan's sed script.